Daily Routine Sit in your appropriate seat quietly Have all necessary materials out All back packs on the floor All cell phones on silent and away in backpacks All IPods off and headphones out of your ears Hats off No food or drink except for water

Bell Work What is deposition? What is lithofication and what two processes help form sedimentary rocks?

Metamorphic Rocks

Today, we will be able to: Describe how metamorphic rocks form Define how metamorphic rocks change with heat and/or pressure in large and small scaled settings Identify metamorphic rocks by foliation or lack of foliation

Metamorphic Rocks Heat and pressure change rocks Big Idea Supporting Detail Heat and pressure change rocks Heat and pressure change rocks Metamorphism – process which rocks change

Metamorphic Rocks Heat and pressure change rocks Big Idea Supporting Detail Heat and pressure change rocks Metamorphic rocks come from a parent rock Recrystallization: Minerals crystals can grow larger New minerals can form and rearrange

Metamorphic Rocks Metamorphic Changes occur over large and small areas Big Idea Supporting Detail Metamorphic Changes occur over large and small areas Large scale = mountain building Rocks are buried Deeper rocks change more; more heat and pressure

Metamorphic Rocks Metamorphic Changes occur over large and small areas Big Idea Supporting Detail Metamorphic Changes occur over large and small areas Small scale = magma contact changes minerals Earthquakes = pressure by grinding

Metamorphic Rocks Most metamorphic rocks develop bands of minerals Big Idea Supporting Detail Most metamorphic rocks develop bands of minerals Foliation = develop with pressure Develop when minerals flatten out or line up More pressure and heat = larger foliation

Foliated Metamorphic Rocks

Foliation in Gneiss

Metamorphic Rocks Most metamorphic rocks develop bands of minerals Big Idea Supporting Detail Most metamorphic rocks develop bands of minerals Non-Foliation: Made of one mineral Minerals can’t separate or line up Sometimes there isn’t enough pressure

Today’s activity Today we will classify different metamorphic rocks by foliation In the paper chart, write down your observations about foliation, parent rock and how deep below the surface the rock formed Use the chart on the next page to help you identify Metamorphic rocks are labeled with numbers 6-10

Types of Metamorphic Rocks Rock Name Foliation or None How deep? Parent Rock Description Slate Foliated Shallow Shale Very fine minerals; flat and black Phyllite Medium Wavy, flakey, more visible layers, greenish Schist Very flakey, looks like mica, light brown, garbage rock Gneiss Deep Shale or Granite Large white and black bands Marble None Depends Limestone Usually white or gray and crystal like; reacts with acid Quartzite Sandstone Hard, gray or reddish